Me also having same problem. By enabling notification reminder it only reminds for unread notification but it doesn't solve the issue of waking up the lock screen. If you can provide the solution for this then lot of users will be relived from this...

Hi, me too having same issue. It is very frustrating when you miss the basic simple function which even comes in 5k phone. If you by any chance find solution without using the third party app please please please please please let me know too... T...